Android RTP SDP X264 problem (Have audio, but no Video)

Question

Android will play both the audio and video (AAC,h263) that I server it from my rtp server, but when I serve an AAC/H264 stream, I only get the audio and no video.

In the working scenario, Android issues a SETUP command for both track ids, but the H264, android never issues the SETUP command for the second Video track.

Is my SDP file correct? The profile-id and sprops I believe are correct as are copied directly from the sps and pps NALs from the H264 encoder. The video is [email protected]

Is Android failing to repsond or recognise the second track?

If I stream the video file by itself with live555 it works fine, and I have compared the SDP file it produces with my own one.

Any ideas? Thanks

H264/AAC SDP file:

v=0
o=xxx IN IP4 192.168.13.43
s=live.3gp
u=http:///
e=admin@
c=IN IP4 0.0.0.0
b=AS:187
t=0 0
a=control:rtsp://192.168.13.43:555/live.3gp
a=isma-compliance:1,1.0,1
a=range:npt=0-  2630.336000
m=audio 0 RTP/AVP 97
a=rtpmap:97 MP4A-LATM/44100/2
a=control:rtsp://192.168.13.43:555/live.3gp/trackID=1
a=fmtp:97 profile-level-id=41; cpresent=0; config=400024203fc0
m=video 0 RTP/AVP 96
a=rtpmap:96 H264/90000
a=control:rtsp://192.168.13.43:555/live.3gp/trackID=2
a=cliprect:0,0,256,432
a=framesize:96 432-256
a=fmtp:96 packetization-mode=1; profile-level-id=42C015;sprop-parameter-   sets=Njc0MkMwMTVGNDBEODQzNjAyMjAwMDAwMDMwMDIwMDAwMDAzMDNDMUUzMDY1NA==,NjhDRTA0NzI=

SDP file produced by live555 for the same video file which does display on Android:

v=0
o=- 1303401850159891 1 IN IP4 192.168.13.58
s=H.264 Video, streamed by the LIVE555 Media Server
i=live.3g
t=0 0
a=tool:LIVE555 Streaming Media v2011.01.19
a=type:broadcast
a=control:*
a=range:npt=0-
a=x-qt-text-nam:H.264 Video, streamed by the LIVE555 Media Server
a=x-qt-text-inf:baseCasterCap.264
m=video 0 RTP/AVP 96
c=IN IP4 0.0.0.0
b=AS:500
a=rtpmap:96 H264/90000
a=fmtp:96 packetization-mode=1;profile-level-id=42C015;sprop-parameter-sets=Z0LAFfQNhDYCIAAAAwAgAAADA8HjBlQ=,aM4Ecg==
a=control:track1

jesup jesup · Accepted Answer · 2011-04-24T21:37:33

sprop-parameter-sets shouldn't have a tab or space in it (may be a copy/paste bug).

Android (or the player being used there) may not support packetization-mode 1. 0 is required; 1 is optional.

a=framesize and a=cliprect - those aren't standard H.264, but may not be a problem.

I assume the port 0 is normal for your usage (since audio works)? In offer-answer, port 0 would be a rejected stream (in an answer; in an offer it means a disabled stream).

I've seen implementations (I'm looking at YOU, Grandstream!) that insist on spaces after semi-colons for H264 fmtp (they're wrong) - you have a mixture.

Is the "C0" in the profile-level-id correct? that adds constraints; try it without the constraints and see what the response is. (You can still send a more-constrained stream than the SDP indicated.)

Android RTP SDP X264 problem (Have audio, but no Video)

2 Answers